Bray Wyatt's dad, Mike Rotunda, is opening up on his constant grief following the late WWE Superstar's tragic death ... saying life without his son has been nothing short of a "nightmare."
Rotunda -- who was famous in his own right as a wrestler for decades, most notably as Irwin R. Schuster -- joined the "Wrasslin Talk with Mayor McCall" podcast to discuss Wyatt (real name Windham Rotunda) ... and, understandably, he's still struggling to come to terms with the loss.
"It's been really hard," Rotunda said.